Co-nitrogen co-doped carbon aerogel catalyst for fuel cell and preparation method thereof

A carbon aerogel, fuel cell technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of increased mass transfer resistance, difficulty in breaking through stability and taking into account the activity, etc., to reduce the preparation cost and achieve excellent electrocatalytic activity. and stability, the effect of promoting development

Active Publication Date: 2018-12-28
武汉氢能与燃料电池产业技术研究院有限公司
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Problems solved by technology

[0004] However, this type of catalyst still has two fatal shortcomings: It is difficult to break through the stability and take into account the activity (identification of the active site); There are scientific and technical problems that need to be solved urgently when applied to the cathode catalytic layer (thicker catalytic layer leads to the problem of increased mass transfer resistance)

Method used

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  • Co-nitrogen co-doped carbon aerogel catalyst for fuel cell and preparation method thereof
  • Co-nitrogen co-doped carbon aerogel catalyst for fuel cell and preparation method thereof
  • Co-nitrogen co-doped carbon aerogel catalyst for fuel cell and preparation method thereof

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preparation example Construction

[0032] The preparation method of the non-precious metal catalyst for the fuel cell of the present invention comprises two major steps. First, the hydrothermal reaction method is used to synthesize Co-phen by controlling the pH, reaction temperature and time of the reaction, and then the carbon airgel is synthesized by the sol-gel method; Then Co-phen was coated with carbon aerogel, and the composite material obtained in the previous step was 2 Preparation of cobalt-nitrogen co-doped carbon airgel catalyst by calcination at high temperature. Specific steps are as follows:

[0033] (1) Preparation of metal-organic framework complexes (Co-phen).

[0034] Such as Image 6 shown. A: Pyridine 2,6-dicarboxylic acid dissolved in 20ml of methanol, B: Co(NO 3 ).6H 2 O and o-phenanthroline were dissolved in a mixed solution of 15ml of methanol and 20ml of deionized water, and the completely dissolved A was added to the completely dissolved B solution, stirred at room temperature for...

Embodiment 1

[0044] (1) Weigh Co-phen and carbon airgel with a ratio of 1:10 into a 100ml beaker, add 20-40ml of ethylene glycol, and stir it ultrasonically to dissolve it completely;

[0045] (2) Add 0.5-5mol / L NaOH solution to adjust the pH to 7-10, stir at room temperature for 12-24h, and dry by suction;

[0046] (3) Put the composite material obtained in (2) in a porcelain boat, and put it in N 2 Under the atmosphere, use a tube furnace to treat it at a high temperature of 600-800° C. for 2-5 hours to obtain a non-precious metal catalyst.

Embodiment 2

[0048] (1) Weigh Co-phen and carbon airgel with a ratio of 2:10 into a 100ml beaker, add 20-40ml of ethylene glycol, and stir ultrasonically to completely dissolve it;

[0049] (2) Add 0.5-5mol / L NaOH solution to adjust the pH to 7-10, stir at room temperature for 12-24h, and dry by suction;

[0050] (3) Put the composite material obtained in (2) in a porcelain boat, and put it in N 2 Under the atmosphere, use a tube furnace to treat it at a high temperature of 600-800° C. for 2-5 hours to obtain a non-precious metal catalyst.

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Abstract

The invention discloses a co-nitrogen co-doped carbon aerogel catalyst for a fuel cell and a preparation method thereof. The core-shell structure and material composition are Co-phen at CA; the carrier is carbon aerogel after high temperature carbonization, and the active components are cobalt, cobalt oxide and cobalt carbides uniformly distributed on the surface of carbon aerogel. Cobalt nitratehexahydrate and organic ligand o-phenanthroline and pyridine 2, 6-dicarboxylic acid react in hydrothermal environment to form a new kind of metal-organic skeleton complexes with sheet structure, and anew kind of composite material is formed by carbon aerogel coating. The calcination process uses N2 as protective gas, thereby obviously reducing the preparation cost, which will promote the furtherdevelopment of non-noble metal catalysts.

Description

technical field [0001] The invention belongs to the technical field of non-precious metal catalysts for fuel cells, in particular to a cobalt-nitrogen co-doped carbon airgel catalyst (Co- phen@CA). Background technique [0002] As a power generation device that directly converts the chemical energy of fuel into electrical energy through electrochemical reactions, fuel cells are a clean energy device with broad application prospects in the 21st century. Its appearance is expected to replace the current stage Conventional energy and rechargeable lithium-ion batteries. As an alkaline fuel cell that can operate smoothly at low temperature, its development is getting more and more attention. [0003] At present, low-temperature fuel cell cathode catalysts rely entirely on platinum (Pt) to meet power requirements, and the cost and reserves of Pt limit its commercialization. Therefore, the development of low-cost, high-active density centers, and high-stability non-noble metal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90
CPCH01M4/8647H01M4/9016H01M4/9041H01M4/9083Y02E60/50
Inventor 李柯余罡花仕洋吴昊詹东旭
Owner 武汉氢能与燃料电池产业技术研究院有限公司
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